Aluminium oxide is impermeable and, unlike the oxide layers on many other metals, it adheres strongly to the parent metal. If damaged mechanically, aluminiumâs oxide layer repairs itself immediately.
Saliva helps remove oral waste and cavity-causing bacteria, protects teeth from decay by neutralizing harmful acids, and helps re-mineralize tooth enamel. Saliva also keeps oral tissues healthy by preventing infection by controlling bacteria and fungi in the mouth.
Salivary Amylase. Several types of salivary glands in your mouth produce and secrete a digestive enzyme called salivary amylase. This enzyme is known as an alpha-amylase. It can break chemical bonds called alpha-bonds that occur in between long chains of glucose molecules in complex starches.